简单shell 编程

简单shell编程  by  dreamboy

#!/bin/bash
while true
do
    echo 
    clear
    echo 
    echo "        系统维护菜单        "
    echo "============================ "
    echo "      1)显示系统日期         "
    echo "      2)修改系统日期         "
    echo "      3)显示已登录用户       "
    echo "      4)重启电脑             "
    echo "      5)关机                 "
    echo "      6)退出                 "
    echo "============================ "
    echo "                            "
    echo -n "请选择："
    read sel
    case ${sel} in
        1) date +"%Y-%m-%d %H:%M";;
        2) echo -n "请输入新的日期(MMDDhhmm[[CC]YY])："
           read da
           date ${da};;
        3) who -u | awk '{print $1}';;
        4) shutdown -r now;;
        5) shutdown -h now;;
        6) break;;
    esac
    read
done